Yes, I know, Hertz & Avis are going to be good service, but expensive. There's a bunch of deep discounters where you are sort of rolling the dice in my experience. Some have terrible counter efficiency with long lines (partly due to all the people just picking the cheapest rate), others put a $400 hold on your credit card instead of the typical $200, and some have fine print designed to trick you to getting insurance or other charges unless you are careful.
It's pretty pointless to even read the Yelp reviews as who the heck would take time out to go write a good review for a rental car company? No me. So the reviews are of course heavily skewed towards the negative as opposed to a restaurant review where people might be inclined to write about a great dining experience. (I guess that's also going to be the case with car rental reviews on Tripadvisor)
So wondering, especially as far as the frequent travelers out there, which of the deep discount care rental agencies aren't that bad? Examples: Payless, E-Z, Fox, Advantage, MCAR, Silvercar, U-Save are all the ones I can think of.